Dioscorea villosa can be used to treat diseases such as dampness-heat underflow and polio sores. Dioscorea villosa has the effect of clearing heat and eliminating dampness (removing heat and dampness from the body). It is made up of castor seed, coix seed and cypress. Among them, Huang Bai clears heat and dries dampness (removing heat and drying dampness); Coix Seed promotes drainage and seepage of dampness (promoting the flow of water to get rid of dampness); Dioscorea villosa and Slippery Stone promote the flow of water to get rid of dampness; Ze Xie diarrhea clears heat and gets rid of dampness; Mudanpi clears heat and cools the Blood (alleviating the heat of the Blood by clearing the heat); Poria cocos is beneficial to dampness and heat; and Tong Cao is beneficial to urination. The whole formula can clear heat and benefit dampness. It can be used to treat lower limb sores caused by dampness-heat, eczema, lower limb dandruff (an acute infectious disease where the skin is red as if painted), red tongue, yellowish tongue coating, etc. It should not be taken by people with Yin deficiency. It should not be taken by people with yin deficiency, the adverse effects and contraindications are not exact, and the taking of which requires a doctor’s guidance.